Mean State

Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 3.59
I62_CRUJRA [-] 3.61 3.63 3.59 3.57 0.0538 0.955 1.08 0.621 0.650 0.844 0.986 0.750
I63_CRUJRA [-] 3.61 3.63 3.59 3.57 0.0538 0.955 1.08 0.621 0.650 0.844 0.986 0.750
I65_CRUJRA [-] 3.61 3.63 3.59 3.57 0.0538 0.955 1.08 0.621 0.650 0.844 0.986 0.750
I67_GSWP3 [-] 3.56 3.57 3.60 3.69 -0.0207 0.910 1.09 0.639 0.664 0.834 0.992 0.758
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.26
I62_CRUJRA [-] 2.38 2.35 2.24 3.40 0.119 0.682 0.219 0.569 0.650 0.977 0.980 0.765
I63_CRUJRA [-] 2.38 2.35 2.24 3.40 0.119 0.682 0.219 0.569 0.650 0.977 0.980 0.765
I65_CRUJRA [-] 2.38 2.35 2.24 3.40 0.119 0.682 0.219 0.569 0.650 0.977 0.980 0.765
I67_GSWP3 [-] 2.35 2.32 2.25 5.42 0.0914 0.650 0.223 0.590 0.671 0.976 0.983 0.778
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.31
I62_CRUJRA [-] 2.35 2.34 2.30 2.62 0.0496 0.676 0.742 0.698 0.718 0.909 0.989 0.806
I63_CRUJRA [-] 2.35 2.34 2.30 2.62 0.0496 0.676 0.742 0.698 0.718 0.909 0.989 0.806
I65_CRUJRA [-] 2.35 2.34 2.30 2.62 0.0496 0.676 0.742 0.698 0.718 0.909 0.989 0.806
I67_GSWP3 [-] 2.38 2.37 2.32 2.32 0.0727 0.654 0.663 0.702 0.734 0.914 0.989 0.815
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 0.964
I62_CRUJRA [-] 0.969 0.969 0.954 1.08 0.0349 0.256 0.506 0.749 0.700 0.952 0.993 0.819
I63_CRUJRA [-] 0.969 0.969 0.954 1.08 0.0349 0.256 0.506 0.749 0.700 0.952 0.993 0.819
I65_CRUJRA [-] 0.969 0.969 0.954 1.08 0.0349 0.256 0.506 0.749 0.700 0.952 0.993 0.819
I67_GSWP3 [-] 1.13 1.12 0.962 0.857 0.218 0.347 0.825 0.587 0.712 0.898 0.921 0.766
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 6.90
I62_CRUJRA [-] 7.79 7.80 6.99 6.59 0.566 1.87 1.61 0.569 0.653 0.762 0.858 0.699
I63_CRUJRA [-] 7.79 7.80 6.99 6.59 0.566 1.87 1.61 0.569 0.653 0.762 0.858 0.699
I65_CRUJRA [-] 7.79 7.80 6.99 6.59 0.566 1.87 1.61 0.569 0.653 0.762 0.858 0.699
I67_GSWP3 [-] 8.03 8.05 6.90 6.78 0.657 1.87 1.34 0.550 0.672 0.806 0.856 0.711
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.37
I62_CRUJRA [-] 1.47 1.47 1.36 1.94 0.118 0.229 0.306 0.771 0.809 0.978 0.991 0.872
I63_CRUJRA [-] 1.47 1.47 1.36 1.94 0.118 0.229 0.306 0.771 0.809 0.978 0.991 0.872
I65_CRUJRA [-] 1.47 1.47 1.36 1.94 0.118 0.229 0.306 0.771 0.809 0.978 0.991 0.872
I67_GSWP3 [-] 1.47 1.47 1.36 1.90 0.128 0.219 0.306 0.750 0.845 0.972 0.965 0.875
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.57
I62_CRUJRA [-] 1.43 1.43 1.53 3.96 0.0266 0.421 0.617 0.697 0.750 0.914 0.982 0.819
I63_CRUJRA [-] 1.43 1.43 1.53 3.96 0.0266 0.421 0.617 0.697 0.750 0.914 0.982 0.819
I65_CRUJRA [-] 1.43 1.43 1.53 3.96 0.0266 0.421 0.617 0.697 0.750 0.914 0.982 0.819
I67_GSWP3 [-] 1.44 1.45 1.55 4.53 0.0622 0.426 0.766 0.691 0.758 0.885 0.978 0.814
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 3.60
I62_CRUJRA [-] 3.57 3.57 3.51 4.92 0.367 1.77 0.873 0.538 0.518 0.888 0.903 0.673
I63_CRUJRA [-] 3.57 3.57 3.51 4.92 0.367 1.77 0.873 0.538 0.518 0.888 0.903 0.673
I65_CRUJRA [-] 3.57 3.57 3.51 4.92 0.367 1.77 0.873 0.538 0.518 0.888 0.903 0.673
I67_GSWP3 [-] 3.70 3.69 3.60 4.73 0.503 1.81 0.767 0.516 0.516 0.907 0.899 0.671
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 0.979
I62_CRUJRA [-] 1.11 1.11 0.990 0.721 0.110 0.214 0.360 0.732 0.789 0.969 0.994 0.855
I63_CRUJRA [-] 1.11 1.11 0.990 0.721 0.110 0.214 0.360 0.732 0.789 0.969 0.994 0.855
I65_CRUJRA [-] 1.11 1.11 0.990 0.721 0.110 0.214 0.360 0.732 0.789 0.969 0.994 0.855
I67_GSWP3 [-] 1.30 1.30 0.979 0.777 0.302 0.373 1.23 0.466 0.747 0.838 0.928 0.745
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.61
I62_CRUJRA [-] 1.43 1.43 1.54 2.57 0.0582 0.457 0.671 0.682 0.753 0.912 0.912 0.803
I63_CRUJRA [-] 1.43 1.43 1.54 2.57 0.0582 0.457 0.671 0.682 0.753 0.912 0.912 0.803
I65_CRUJRA [-] 1.43 1.43 1.54 2.57 0.0582 0.457 0.671 0.682 0.753 0.912 0.912 0.803
I67_GSWP3 [-] 1.47 1.46 1.61 2.72 0.105 0.459 0.657 0.691 0.769 0.914 0.928 0.814
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.95
I62_CRUJRA [-] 2.15 2.15 1.94 2.02 0.246 0.468 0.794 0.630 0.790 0.890 0.832 0.786
I63_CRUJRA [-] 2.15 2.15 1.94 2.02 0.246 0.468 0.794 0.630 0.790 0.890 0.832 0.786
I65_CRUJRA [-] 2.15 2.15 1.94 2.02 0.246 0.468 0.794 0.630 0.790 0.890 0.832 0.786
I67_GSWP3 [-] 2.32 2.34 1.96 1.84 0.405 0.570 0.958 0.523 0.762 0.854 0.853 0.751
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.05
I62_CRUJRA [-] 2.25 2.24 2.00 1.07 3.03 0.343 0.783 0.882 0.657 0.727 0.881 0.903 0.779
I63_CRUJRA [-] 2.25 2.24 2.00 1.07 3.03 0.343 0.783 0.882 0.657 0.727 0.881 0.903 0.779
I65_CRUJRA [-] 2.25 2.24 2.00 1.07 3.03 0.343 0.783 0.882 0.657 0.727 0.881 0.903 0.779
I67_GSWP3 [-] 2.09 2.09 2.03 1.00 3.37 0.210 0.653 1.03 0.633 0.733 0.851 0.946 0.779
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 0.386
I62_CRUJRA [-] 0.392 0.394 0.375 0.672 0.0419 0.224 1.21 0.767 0.814 0.817 0.944 0.831
I63_CRUJRA [-] 0.392 0.394 0.375 0.672 0.0419 0.224 1.21 0.767 0.814 0.817 0.944 0.831
I65_CRUJRA [-] 0.392 0.394 0.375 0.672 0.0419 0.224 1.21 0.767 0.814 0.817 0.944 0.831
I67_GSWP3 [-] 0.350 0.353 0.386 0.641 0.00237 0.222 1.15 0.764 0.815 0.826 0.955 0.835
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.04
I62_CRUJRA [-] 1.07 1.06 1.04 0.355 1.15 0.0269 0.337 0.582 0.695 0.692 0.941 0.971 0.798
I63_CRUJRA [-] 1.07 1.06 1.04 0.355 1.15 0.0269 0.337 0.582 0.695 0.692 0.941 0.971 0.798
I65_CRUJRA [-] 1.07 1.06 1.04 0.355 1.15 0.0269 0.337 0.582 0.695 0.692 0.941 0.971 0.798
I67_GSWP3 [-] 1.23 1.22 1.05 0.351 0.834 0.208 0.431 0.586 0.596 0.681 0.938 0.878 0.755
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.68
I62_CRUJRA [-] 2.94 2.95 2.56 3.26 0.625 1.27 1.01 0.503 0.600 0.850 0.888 0.688
I63_CRUJRA [-] 2.94 2.95 2.56 3.26 0.625 1.27 1.01 0.503 0.600 0.850 0.888 0.688
I65_CRUJRA [-] 2.94 2.95 2.56 3.26 0.625 1.27 1.01 0.503 0.600 0.850 0.888 0.688
I67_GSWP3 [-] 3.05 3.05 2.67 3.58 0.651 1.16 1.03 0.509 0.639 0.846 0.915 0.710
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.74
I62_CRUJRA [-] 2.92 2.94 2.71 3.27 0.276 0.420 0.980 0.635 0.823 0.857 0.989 0.826
I63_CRUJRA [-] 2.92 2.94 2.71 3.27 0.276 0.420 0.980 0.635 0.823 0.857 0.989 0.826
I65_CRUJRA [-] 2.92 2.94 2.71 3.27 0.276 0.420 0.980 0.635 0.823 0.857 0.989 0.826
I67_GSWP3 [-] 3.04 3.06 2.74 3.23 0.399 0.500 0.975 0.500 0.830 0.860 0.991 0.802
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 2.03
I62_CRUJRA [-] 2.11 2.12 1.98 3.24 0.275 0.567 0.773 0.623 0.732 0.897 0.899 0.777
I63_CRUJRA [-] 2.11 2.12 1.98 3.24 0.275 0.567 0.773 0.623 0.732 0.897 0.899 0.777
I65_CRUJRA [-] 2.11 2.12 1.98 3.24 0.275 0.567 0.773 0.623 0.732 0.897 0.899 0.777
I67_GSWP3 [-] 2.18 2.18 2.04 3.67 0.346 0.615 0.881 0.599 0.736 0.878 0.862 0.762
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.05
I62_CRUJRA [-] 1.26 1.27 1.04 1.98 0.277 0.474 0.791 0.579 0.732 0.888 0.783 0.743
I63_CRUJRA [-] 1.26 1.27 1.04 1.98 0.277 0.474 0.791 0.579 0.732 0.888 0.783 0.743
I65_CRUJRA [-] 1.26 1.27 1.04 1.98 0.277 0.474 0.791 0.579 0.732 0.888 0.783 0.743
I67_GSWP3 [-] 1.28 1.30 1.06 1.51 0.309 0.468 0.864 0.563 0.743 0.868 0.813 0.746
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 5.44
I62_CRUJRA [-] 6.13 6.13 5.47 4.07 0.685 1.44 0.737 0.593 0.699 0.915 0.963 0.774
I63_CRUJRA [-] 6.13 6.13 5.47 4.07 0.685 1.44 0.737 0.593 0.699 0.915 0.963 0.774
I65_CRUJRA [-] 6.13 6.13 5.47 4.07 0.685 1.44 0.737 0.593 0.699 0.915 0.963 0.774
I67_GSWP3 [-] 6.18 6.18 5.47 4.26 0.687 1.38 0.696 0.615 0.719 0.923 0.959 0.787
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 3.25
I62_CRUJRA [-] 3.25 3.23 3.26 3.01 -0.00688 0.655 0.696 0.702 0.788 0.917 0.937 0.826
I63_CRUJRA [-] 3.25 3.23 3.26 3.01 -0.00688 0.655 0.696 0.702 0.788 0.917 0.937 0.826
I65_CRUJRA [-] 3.25 3.23 3.26 3.01 -0.00688 0.655 0.696 0.702 0.788 0.917 0.937 0.826
I67_GSWP3 [-] 3.35 3.34 3.27 2.47 0.0745 0.565 0.637 0.750 0.809 0.921 0.973 0.852
Download Data
Period Mean (original grids) [mm d-1]
Model Period Mean (intersection) [mm d-1]
Benchmark Period Mean (intersection) [mm d-1]
Model Period Mean (complement) [mm d-1]
Benchmark Period Mean (complement) [mm d-1]
Bias [mm d-1]
RMSE [mm d-1]
Phase Shift [months]
Bias Score [1]
RMSE Score [1]
Seasonal Cycle Score [1]
Spatial Distribution Score [1]
Overall Score [1]
Benchmark [-] 1.26
I62_CRUJRA [-] 1.43 1.45 1.27 1.15 0.303 0.990 0.919 0.371 0.562 0.884 0.524 0.581
I63_CRUJRA [-] 1.43 1.45 1.27 1.15 0.303 0.990 0.919 0.371 0.562 0.884 0.524 0.581
I65_CRUJRA [-] 1.43 1.45 1.27 1.15 0.303 0.990 0.919 0.371 0.562 0.884 0.524 0.581
I67_GSWP3 [-] 1.68 1.68 1.25 2.14 0.420 0.855 0.851 0.419 0.610 0.888 0.583 0.622

Temporally integrated period mean

BENCHMARK MEAN
Data not available
Data not available
MODEL MEAN
Data not available
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BIAS
Data not available
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BIAS SCORE
Data not available
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RMSE
Data not available
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RMSE SCORE
Data not available
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BENCHMARK MAX MONTH
Data not available
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MODEL MAX MONTH
Data not available
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DIFFERENCE IN MAX MONTH
Data not available
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SEASONAL CYCLE SCORE
Data not available
Data not available

SPATIAL TAYLOR DIAGRAM
Data not available
MODEL COLORS
Data not available

Spatially integrated regional mean

MODEL COLORS
Data not available
REGIONAL MEAN
Data not available
ANNUAL CYCLE
Data not available
MONTHLY ANOMALY
Data not available
ANNUAL CYCLE
Data not available

All Models

Benchmark
Data not available
Data not available
I62_CRUJRA
Data not available
Data not available
I63_CRUJRA
Data not available
Data not available
I65_CRUJRA
Data not available
Data not available
I67_GSWP3
Data not available
Data not available

Data Information

  Title:
CPC Merged Analysis of Precipitation (excludes NCEP Reanalysis)

  Version:
1904

  Institutions:
NOAA/OAR/ESRL PSD, Boulder, Colorado, USA

  Source:
Merged Precipitation with gauge observations, a variety of satellite observations and the NCEP–NCAR reanalysis

  History:
2019-04-30: downloaded source from https://www.esrl.noaa.gov/psd/data/gridded/data.cmap.html#detail
2019-07-01: converted to netCDF with https://github.com/mmu2019/Datasets/blob/master/read-pr-cmap.py

  References:
Xie, P., and P.A. Arkin (1997), Global precipitation: A 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs, Bull. Amer. Meteor. Soc., 78, 2539-2558
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  Comments:
time_period: 1979-01 through 2018-12
original_temporal_resolution: monthly
original_spatial_resolution: 2.5 degree
original_units: mm/day
final_temporal_resolution: monthly
final_spatial_resolution: 0.5 degree
final_units: kg/m2/s

  Convention:
CF-1.7